Metaseries

A media franchise is a set of related media in which several derivative works have been produced from an original creative work (usually that of fiction), such as a film, a work of literature, a television program or a video game. A media franchise is characterized by its components generally sharing a common fictional universe.

The intellectual property from the original work can be licensed to other parties or partners for further derivative works and commercial exploitation across a range of mediums and by a variety of industries for merchandising purposes.

A media franchise typically consists of cross-marketing across more than one medium. For the owners, the goal of increasing profit through diversity can extend the commercial profitability of the franchise and can create strong feelings of identity and ownership in its consumers. Aarseth describes the financial logic of cost-recovery for expensive productions by identifying that a single medium launch is a lost opportunity, the timeliness of the production and release is more important than its integrity, the releases should raise brand awareness and the cross-ability of the work is critical for its success.American Idol was a transmedia franchise from its beginnings, with the first season winner Kelly Clarkson signing with RCA Records and having the release of A Moment Like This becoming a #1 hit on Billboard Hot 100. The success resulted in a nationwide concert tour, an American Idol book that made the bestseller list and the film From Justin to Kelly. A transmedia franchise however is often referred to by the simpler term "media franchise." The term media franchise is often used to describe the popular adaptation of a work into films, like the popular Twilight book series that was adapted into the five films of The Twilight Saga. Other neologisms exist to describe various franchise types including "metaseries," which can be used to describe works such as Isaac Asimov's Foundation series.

...
Wikipedia